Add properties dynamically at run time in existing class c#

I have a UI from where we are adding following values in a table Fields

• ProductName
• ProductId
• ProductCode

I have a existing class Product with some existing properties

public class Product
{
    public string ProductID { get; set; }
    //product in a product search listing
    public string StoreName { get; set; }
    public string SearchToken { get; set; }

}

I am looking for a method which will add properties in existing class Product at run time (dynamically) when user adds values in a table Fields